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2 times NAT

2 times NAT

Created: Aug 31, 2021 06:31:11Latest reply: Aug 31, 2021 16:24:12 345 7 0 0 0
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Hi all


I had a pair og USG6716 , also come along with secomanager.


As can seen on the attached topology, it is mandate to do NAT policy on secomanager.


I would like to ask


question 1: As bubble 1 showing, how traffic from DMZ can SSH to the real machine? (USG doing NAT)


question 2: inside host would like to publish over public network, but the firewall facing internet is not the USG, yet traffic is USG (NAT) then another Firewall (NAT again?)


How do i solve this secomanager mandata NAT policy case?

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DDSN
DDSN Admin Created Aug 31, 2021 06:37:36

Hi noel_nyk,
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chenhui
chenhui Admin Created Aug 31, 2021 11:22:40

Hello,
question 1: As bubble 1 showing, how traffic from DMZ can SSH to the real machine? (USG doing NAT)
====== Will the traffic between the Jumphost and the inside host be NATed?

question 2: inside host would like to publish over public network, but the firewall facing internet is not the USG, yet traffic is USG (NAT) then another Firewall (NAT again?)
====== Will the traffic from the inside host be NATed on both inside firewall and outside firewall?
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smileymind
smileymind Created Aug 31, 2021 16:25:36 (0) (0)
 
noel_nyk
noel_nyk Created Sep 1, 2021 01:10:06 (0) (0)
Hi

Jumpshot and inside host passing thru the USG, there force to do the NAT. But i found out secomanage there's an option for NAT policy is no action on source and destination , so this should be ease off the NAT purpose, by using pure routing then.

Is my concept correct?  
chenhui
chenhui Reply noel_nyk  Created Sep 1, 2021 09:14:53 (1) (0)
Yes, no action will not NAT the defined traffic. You can exclude this management traffic from NAT so that you can easily manage your network.  
hemin88
hemin88 Created Sep 3, 2021 11:54:56 (0) (0)
Great answer as usual, well done dear  
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4#
Navin_kay
Navin_kay Created Aug 31, 2021 16:24:12

Thank
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